Jointing apparatus for boiler-tubes.



S. A. DUGAN. JOINTING APMRMUS FOR BmLER TUBES. APPLIGAIION FILED MAR. 27,1912.

ywym Fat-@med Nov. 18, 1913l TTORNEVS Mi l titi

' ertures 12.

'To all whomz't may concern.'

mm1?) STATESjennr QFFICE,

. l i S aus'rm Duden, or Grondona, canas zoNr.

initalia..

Be it known that l, SAMUEL A; Busan, citizen of the United `fltates, andV a resident of Gorgona, CanalZone, `Panama, have invented a new and Improved Jointing Apparatus for .Boiler-llibres, of which the fellowing is a My 'invention relates to devices for. goin.-`

ing the tubes for steam boilers to 'the tube sheets, and itV comprises certain improvements in this class of devices which will be fully set forth in the accompanying description and part-icularly pointed out in the claims appended thereto. i

Reference is to be'had to theaccompanying drawings forming a part of this specification, in which the same characters of reference indicate the same parts throughout the view.

rllhe ligure is a vertical longitudinal sec-4 formed jso as 'to make up a jointthat will edectually prevent any loosening of the tube, with consequent leakage in practice.

'lfhe cutter for forming the grooves 3 comprises a base L1 which is securedV to the tube sheet by means of bolts or nuts 5, these bolts passing through the openings 3, as shown in the drawing. The base l is perforatedto rovide a bearing for a rotatable hollow shaft 6, which' has a longitudinal bore 7 formed therein, anda recess 8. The hollow shaft 6 also carries a pair of collars 9, se-

cured in place by binding bolts 10, one above and one below the base 4, in the position of the parts shown in the drawing, to prevent the shaft 6 from moving longitudinally in the base 4.

The working end of the shaft 6 carries a plurality of cutters 11 vtting in radial ap- These cutters are slotted longitudinally and held in place y means of bolts lThey are engaged at heirinner ends and forced outward by the tapered end of a spindle 14 located in the bore 7 of the shaft 6, and having screw threads 15 thereon. These screw threads 15 engage a nut 16 in the recess 48, and this nut `has projections 17 extending out through the sides of the re- Speccatori of LettersvIPatent.

full, clear,'and exact description. i

cess to enable the same to be turned so as to adjust the relative position of the spindle 14. It will be apparenttha-t when the shaft 6 Patented; Nov. is, iaiafi applicati-numeri March 2?, 1912; Serial No. 686,602. z l 50:21-

is turning, the cutter blades 11 will be turned 6o with it to form the grooves 3, and as thel tapered end of the spindle ,14 is IllOved downward referring to the position of the parts on the drawing, these cutter blades will be forced outward. The depth of the grooves 3 will be made equal to the :thickness of the tubes which are to have their ends inserted into the openings 2 to be joined to the sheet, and the cutter' knives 11 are fed outward just to this extent. The end of the tapered section of the spindle 14; is squared .and the spindle can be adjusted by engaging the nut 16 and the squared end with suitable tools and turning either the nut or the spindle, as preferred. V I wish to have it understood that the above description is illustrative only and that I do not care to be limited to the exact details of the arrangement therein shown and de-i g@ scribed, but wish to reserve to myself the right to maire such changes in the shape, size and arrangement of the parts as fairly fall within the scope and spirit of my claims.

Having thus described my invention, l claim as new and desire to secure by Letters Patent:

1. Jointing apparatus for boiler tubes, comprising a hollow shaft, radially eXtensiblel cutters carried' by said shaft, a spindle mounted in said hollow shaft and having a tapered section to engage the inner ends of said cutters and move the same outward, said spindle having screw threads thereon, an adjusting nut carried by said spindle and engaging said threads and located in a recess in said hollow tion of said spindle with respect to the'said shaft to move the cutters outward, and means for mounting saidushaft in operative relation with respect toa perforated tube sheet, whereby when the shaftis turned a groove can be cut in the walls of the perforations of said tube sheet.

2. vlointin-g apparatus for boiler tubes, comprising a shaft, laterally-extending cutshaft to control the posil ters carried by said shaft, means for mounting said shaft, said mounting means forming a bearing, collars on said shaft to prevent longtudinal movement thereof with respect to vs'aid,tiem-ing,- and means for securing said mounting `means to a perforated tube sheet, so' that the said cutters can form grooves in the e ges of the perforations in said sheet. v

'3. Jointing apparatus for boiler tubes,. .Comprising a base, means for securing'said base to a tube sheet having apertures therein,-

said base having a bearing, a shaft mounted therein, radially-extending cutters carried by said shaft'and adapted to extend into the V apertures, a spindle engaging s aid cutters to' move them outward; said spindle having screw-threads thereon, and an adjusting nut carried by said spindle to engage' said' outward movement of said cutters, whereby when the shaft is turned a groove can be* cut in the Walls vof the apertures..

In testimony whereof I have signeflfmy name to this specification inthe presence of 20 tWo subscribing witnesses,

SAMUELAUSTIN noemt4 Witnesses:

TALMAGE DYNEs, DAVID MAoGroWAN.v 

